Car wouldn't start. Finally did but wouldn't stay running. PVC valve was
burned and broken at connector. Changed valve, still won't run. Will
start if pump the excellerator a lot but won't stay running. Makes noise
when trying to start and back fires. Any suggestions on what could be
wrong. Need the car to get to work in the morning.

possible air intake leak between mass airflow sensor and throttle body
exhibits same symptoms. stuck open idle air control valve can cause
inability to idle,popping may be a result of pumping accelerator pedal.
then again may just be multiple engine ignition system misfire. hope this
helps.